![]() In the United States, NASA uses military time down to thousandths of a second.Įmergency services such as nursing homes, hospital wards, and intensive care units also use the 24-hour clock but do not refer to it as military time. What is military timeĪirlines typically use the 24-hour clock. military and militaries around the world use military time, so do other large operators whose business takes them through different time zones. or 8 p.m.? With military time, no confusion exists because 0800 is 8 a.m. If you were to arrange to meet a friend at 8, how would your friend know whether you meant 8 a.m. Zulu timekeeping starts at midnight instead of 12 noon or 12 midnight, which is the standard reference for most other time zones. Zulu time is measured in hours, minutes and seconds using the Gregorian calendar, military time divisions of hours and minutes, and a 24-hour format. Military time is used to prevent confusion between a.m. Zulu is the radio transmission articulation for the letter Z. How is military time written - PM hours Why is military time used? From midnight of a new day to noon, the 12-hour and 24-hour times are just about the same:Īfter reaching noon, add the first 12 hours of the day to each of the 12-hour clock times to get the military time: Military time is a 24-hour clock designed to avoid confusion between daytime and nighttime hours, since the armed forces are in operation around the clock. But you only need to concern yourself with the latter part of the day since the early morning hours are familiar. Military time is written in a four-digit format. Spoken numbers follow the custom of the NATO Phonetic Alphabet, so their pronunciation is exaggerated: is read or spoken as "Ten hundred forty-five" or "Ten hundred four-five."ġ159 – A minute before noon is "Eleven hundred fifty-nine" or "Eleven hundred five-niner." For instance, zero nine hundred is how you read 9 AM, and twenty-one hundred is how you read 9 PM. ![]() To tell the hour, you need to read in hundreds rather than thousands. is "Zero one hundred hours."Ġ630 – 6:30 a.m. First of all, remember that the military clock runs from 0000 (zero-zero-zero-zero hours) to 2359 (twenty-three hundred fifty-nine hours). 0000, 0920, 1210), the hour will be the same in both notations with the exception that 0 will be 12 A.M. When reading or in casual conversation, times can be read as three- or four-digit numbers:Ġ000 – Midnight and the start of the day is called "Zero hundred hours."Ġ100 – One a.m. Military Time To 12-hour clock conversion If the number of hours (two first digits) is between 0 and 12 (e.g. On radio and for maximum clarity, every digit is spoken. A leading 0 is read or spoken for the first 12 hours of the day. Military time read and spoken to four digits. Midnight in military time How do you read military time? If your day ends at midnight, you end your day at 2400, pronounced 24 hundred hours. If your day begins at midnight, you use 0000 in military time, pronounced zero hundred hours. In the 24-hour format, midnight has two designations, 0000 and 2400:
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